I think Apple is okay with Creative Zen owners not buying MP3s from them. They're only targeting iPhone/iPod owners, which has by far the largest market share.
The trouble of getting the iTunes store onto the web (http://news.ycombinator.com/item?id=242316) would not be worth it because they already have the largest market share in MP3 players AND in MP3 selling.
So I don't think they mind. People can complain all they want, but as long as Apples earning money, they won't be sad about it.
I guess it depends whether the iTunes music store is about selling music or just selling music to ipod owners. Obviously, Apple's priority is the latter (understandably from a business / monopoly point of view). However, if the iPod/iTunes combination didn't feel like such a lock-in (i.e, if the online music store, software and hardware could operate independently), I might easily be persuaded to drink the Apple juice.
The trouble of getting the iTunes store onto the web (http://news.ycombinator.com/item?id=242316) would not be worth it because they already have the largest market share in MP3 players AND in MP3 selling.
So I don't think they mind. People can complain all they want, but as long as Apples earning money, they won't be sad about it.